早教吧作业答案频道 -->数学-->
用递等式计算.(写出必要的计算过程,能简便计算的用简便方法计算)7.9×12.525.38-1.43-4.38-4.5790+10÷0.4×2.50.8×0.4×(7.6×1.25)×2.52.3×0.48+0.48×8.7-0.12×4;0.1-0.1×[0.01÷(;1-0.9)].
题目详情
用递等式计算.(写出必要的计算过程,能简便计算的用简便方法计算) 7.9×12.5 25.38-1.43-4.38-4.57 90+10÷0.4×2.5 0.8×0.4×(7.6×1.25)×2.5 2.3×0.48+0.48×8.7-0.12×4; 0.1-0.1×[0.01÷(;1-0.9)]. |
7.9×12.5
25.38-1.43-4.38-4.57
90+10÷0.4×2.5
0.8×0.4×(7.6×1.25)×2.5
2.3×0.48+0.48×8.7-0.12×4;
0.1-0.1×[0.01÷(;1-0.9)].
7.9×12.5
25.38-1.43-4.38-4.57
90+10÷0.4×2.5
0.8×0.4×(7.6×1.25)×2.5
2.3×0.48+0.48×8.7-0.12×4;
0.1-0.1×[0.01÷(;1-0.9)].
7.9×12.5
25.38-1.43-4.38-4.57
90+10÷0.4×2.5
0.8×0.4×(7.6×1.25)×2.5
2.3×0.48+0.48×8.7-0.12×4;
0.1-0.1×[0.01÷(;1-0.9)].
7.9×12.5
25.38-1.43-4.38-4.57
90+10÷0.4×2.5
0.8×0.4×(7.6×1.25)×2.5
2.3×0.48+0.48×8.7-0.12×4;
0.1-0.1×[0.01÷(;1-0.9)].
▼优质解答
答案和解析
(1)7.9×12.5,
=(8-0.1)×12.5,
=8×12.5-1×12.5,
=100-12.5,
=87.5;
(2)25.38-1.43-4.38-4.57,
=25.38-4.38-1.43-4.57,
=(25.38-4.38)-(1.43-4.57),
=21-6,
=15;
(3)90+10÷0.4×2.5,
=90+25×2.5,
=90+62.5,
=152.5;
(4)0.8×0.4×(7.6×1.25)×2.5,
=(0.8×1.25)×(0.4×2.5)×7.6,
=1×1×7.6,
=7.6;
(5)2.3×0.48+0.48×8.7-0.12×4,
=2.3×0.48+0.48×8.7-0.48,
=0.48×(2.3+8.7-1),
=0.48×10,
=4.8;
(6)0.1-0.1×[0.01÷(1-0.9)],
=0.1-0.1×[0.01÷0.1],
=0.1-0.1×0.1,
=0.1-0.01,
=0.09. (1)7.9×12.5,
=(8-0.1)×12.5,
=8×12.5-1×12.5,
=100-12.5,
=87.5;
(2)25.38-1.43-4.38-4.57,
=25.38-4.38-1.43-4.57,
=(25.38-4.38)-(1.43-4.57),
=21-6,
=15;
(3)90+10÷0.4×2.5,
=90+25×2.5,
=90+62.5,
=152.5;
(4)0.8×0.4×(7.6×1.25)×2.5,
=(0.8×1.25)×(0.4×2.5)×7.6,
=1×1×7.6,
=7.6;
(5)2.3×0.48+0.48×8.7-0.12×4,
=2.3×0.48+0.48×8.7-0.48,
=0.48×(2.3+8.7-1),
=0.48×10,
=4.8;
(6)0.1-0.1×[0.01÷(1-0.9)],
=0.1-0.1×[0.01÷0.1],
=0.1-0.1×0.1,
=0.1-0.01,
=0.09. (1)7.9×12.5,
=(8-0.1)×12.5,
=8×12.5-1×12.5,
=100-12.5,
=87.5;
(2)25.38-1.43-4.38-4.57,
=25.38-4.38-1.43-4.57,
=(25.38-4.38)-(1.43-4.57),
=21-6,
=15;
(3)90+10÷0.4×2.5,
=90+25×2.5,
=90+62.5,
=152.5;
(4)0.8×0.4×(7.6×1.25)×2.5,
=(0.8×1.25)×(0.4×2.5)×7.6,
=1×1×7.6,
=7.6;
(5)2.3×0.48+0.48×8.7-0.12×4,
=2.3×0.48+0.48×8.7-0.48,
=0.48×(2.3+8.7-1),
=0.48×10,
=4.8;
(6)0.1-0.1×[0.01÷(1-0.9)],
=0.1-0.1×[0.01÷0.1],
=0.1-0.1×0.1,
=0.1-0.01,
=0.09. (1)7.9×12.5,
=(8-0.1)×12.5,
=8×12.5-1×12.5,
=100-12.5,
=87.5;
(2)25.38-1.43-4.38-4.57,
=25.38-4.38-1.43-4.57,
=(25.38-4.38)-(1.43-4.57),
=21-6,
=15;
(3)90+10÷0.4×2.5,
=90+25×2.5,
=90+62.5,
=152.5;
(4)0.8×0.4×(7.6×1.25)×2.5,
=(0.8×1.25)×(0.4×2.5)×7.6,
=1×1×7.6,
=7.6;
(5)2.3×0.48+0.48×8.7-0.12×4,
=2.3×0.48+0.48×8.7-0.48,
=0.48×(2.3+8.7-1),
=0.48×10,
=4.8;
(6)0.1-0.1×[0.01÷(1-0.9)],
=0.1-0.1×[0.01÷0.1],
=0.1-0.1×0.1,
=0.1-0.01,
=0.09.
(1)7.9×12.5, =(8-0.1)×12.5, =8×12.5-1×12.5, =100-12.5, =87.5; (2)25.38-1.43-4.38-4.57, =25.38-4.38-1.43-4.57, =(25.38-4.38)-(1.43-4.57), =21-6, =15; (3)90+10÷0.4×2.5, =90+25×2.5, =90+62.5, =152.5; (4)0.8×0.4×(7.6×1.25)×2.5, =(0.8×1.25)×(0.4×2.5)×7.6, =1×1×7.6, =7.6; (5)2.3×0.48+0.48×8.7-0.12×4, =2.3×0.48+0.48×8.7-0.48, =0.48×(2.3+8.7-1), =0.48×10, =4.8; (6)0.1-0.1×[0.01÷(1-0.9)], =0.1-0.1×[0.01÷0.1], =0.1-0.1×0.1, =0.1-0.01, =0.09. |
=(8-0.1)×12.5,
=8×12.5-1×12.5,
=100-12.5,
=87.5;
(2)25.38-1.43-4.38-4.57,
=25.38-4.38-1.43-4.57,
=(25.38-4.38)-(1.43-4.57),
=21-6,
=15;
(3)90+10÷0.4×2.5,
=90+25×2.5,
=90+62.5,
=152.5;
(4)0.8×0.4×(7.6×1.25)×2.5,
=(0.8×1.25)×(0.4×2.5)×7.6,
=1×1×7.6,
=7.6;
(5)2.3×0.48+0.48×8.7-0.12×4,
=2.3×0.48+0.48×8.7-0.48,
=0.48×(2.3+8.7-1),
=0.48×10,
=4.8;
(6)0.1-0.1×[0.01÷(1-0.9)],
=0.1-0.1×[0.01÷0.1],
=0.1-0.1×0.1,
=0.1-0.01,
=0.09.
=(8-0.1)×12.5,
=8×12.5-1×12.5,
=100-12.5,
=87.5;
(2)25.38-1.43-4.38-4.57,
=25.38-4.38-1.43-4.57,
=(25.38-4.38)-(1.43-4.57),
=21-6,
=15;
(3)90+10÷0.4×2.5,
=90+25×2.5,
=90+62.5,
=152.5;
(4)0.8×0.4×(7.6×1.25)×2.5,
=(0.8×1.25)×(0.4×2.5)×7.6,
=1×1×7.6,
=7.6;
(5)2.3×0.48+0.48×8.7-0.12×4,
=2.3×0.48+0.48×8.7-0.48,
=0.48×(2.3+8.7-1),
=0.48×10,
=4.8;
(6)0.1-0.1×[0.01÷(1-0.9)],
=0.1-0.1×[0.01÷0.1],
=0.1-0.1×0.1,
=0.1-0.01,
=0.09.
=(8-0.1)×12.5,
=8×12.5-1×12.5,
=100-12.5,
=87.5;
(2)25.38-1.43-4.38-4.57,
=25.38-4.38-1.43-4.57,
=(25.38-4.38)-(1.43-4.57),
=21-6,
=15;
(3)90+10÷0.4×2.5,
=90+25×2.5,
=90+62.5,
=152.5;
(4)0.8×0.4×(7.6×1.25)×2.5,
=(0.8×1.25)×(0.4×2.5)×7.6,
=1×1×7.6,
=7.6;
(5)2.3×0.48+0.48×8.7-0.12×4,
=2.3×0.48+0.48×8.7-0.48,
=0.48×(2.3+8.7-1),
=0.48×10,
=4.8;
(6)0.1-0.1×[0.01÷(1-0.9)],
=0.1-0.1×[0.01÷0.1],
=0.1-0.1×0.1,
=0.1-0.01,
=0.09.
=(8-0.1)×12.5,
=8×12.5-1×12.5,
=100-12.5,
=87.5;
(2)25.38-1.43-4.38-4.57,
=25.38-4.38-1.43-4.57,
=(25.38-4.38)-(1.43-4.57),
=21-6,
=15;
(3)90+10÷0.4×2.5,
=90+25×2.5,
=90+62.5,
=152.5;
(4)0.8×0.4×(7.6×1.25)×2.5,
=(0.8×1.25)×(0.4×2.5)×7.6,
=1×1×7.6,
=7.6;
(5)2.3×0.48+0.48×8.7-0.12×4,
=2.3×0.48+0.48×8.7-0.48,
=0.48×(2.3+8.7-1),
=0.48×10,
=4.8;
(6)0.1-0.1×[0.01÷(1-0.9)],
=0.1-0.1×[0.01÷0.1],
=0.1-0.1×0.1,
=0.1-0.01,
=0.09.
看了 用递等式计算.(写出必要的计...的网友还看了以下:
根据前三题的得数,直接写出第四题的答案0.8+0.88=1.68,0.8+0.88+0.888=2. 2020-03-31 …
6.3÷0.021=1.5÷0.03=0.43×5=0.7×8-0.6=72÷24=5×0.7=6 2020-04-07 …
5×0.7=0.43×5=3.6÷0.9-4=240÷37≈3.6-0.36=8.1-2.2=0. 2020-04-07 …
口算.510÷10=510÷100=5.1×10=5.1×100=0.12×6=7.8÷3=0.6 2020-04-07 …
口算.510÷10=510÷100=5.1×10=5.1×100=0.12×6=7.8÷3=0.6 2020-04-07 …
口算2.4+0.73=3.08×4=537-99=2.6×0.3=3-0.71-0.19=8-0. 2020-04-07 …
3.4-1.4= 7.82-7.2= 2.19+9.1= 10.1-0.89= 0.68+0.42 2020-05-15 …
1.8+0.5=2.5-0.1=4.8-0.2=74+71=48+10=24÷12=68÷0.68 2020-07-18 …
0.1*0.3*0.9+0.2*0.6*1.8+0.3*0.9*2.7/0.1*0.2*0.4+0 2020-07-26 …
直接写出得数9+7.8-3.8=5÷2×0.8=0.7+0.4×1.5=2.4-2.4÷1.2=0. 2020-11-19 …