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递等式计算,能简便的用简便方法计算0.25×1.7×0.44.5×10.21.28×7.5+2.5×1.282.5×64×12.520.06×8.5+200.6×0.152.5×0.32+0.32×7.58.8+3.2÷2.51.25×2.5×4×0.88.4×0.3÷0.12
题目详情
递等式计算,能简便的用简便方法计算 0.25×1.7×0.4 | 4.5×10.2 | 1.28×7.5+2.5×1.28 |
2.5×64×12.5 | 20.06×8.5+200.6×0.15 | 2.5×0.32+0.32×7.5 |
8.8+3.2÷2.5 | 1.25×2.5×4×0.8 | 8.4×0.3÷0.12 |
25×(0.4+0.8) | 3.5×99+3.5 | 101×27-27 |
1.25×0.8+1.2×1.25 | 1.25×88 | 32×0.125×0.25 |
6.4×0.21-0.86 | 6.8×0.75÷0.5 | 2.05÷0.82+33.6 |
1.53+23.4÷7.2. |
▼优质解答
答案和解析
(1)0.25×1.7×0.4
=(0.25×0.4)×1.7
=0.1×1.7
=0.17
(2)4.5×10.2
=4.5×(10+0.2)
=4.5×10+4.5×0.2
=45+0.9
=45.9
(3)1.28×7.5+2.5×1.28
=1.28×(7.5+2.5)
=1.28×10
=12.8
(4)2.5×64×12.5
=(2.5×4)×2×(8×12.5)
=10×2×100
=2000
(5)20.06×8.5+200.6×0.15
=20.06×(8.5+1.5)
=20.06×10
=200.6
(6)2.5×0.32+0.32×7.5
=0.32×(7.5+2.5)
=0.32×10
=3.2
(7)8.8+3.2÷2.5
=8.8+1.28
=10.08
(8)1.25×2.5×4×0.8
=(1.25×0.8)×(2.5×4)
=1×10
=10
(9)8.4×0.3÷0.12
=(8.4÷0.12)×0.3
=40×0.3
=12
(10)25×(0.4+0.8)
=25×0.4+0.8×25
=10+20
=30
(11)3.5×99+3.5
=3.5×(99+1)
=3.5×100
=350
(12)101×27-27
=(101-1)×27
=100×27
=2700
(13)1.25×0.8+1.2×1.25
=1.25×(0.8+1.2)
=1.25×2
=2.5
(14)1.25×88
=1.25×(80+8)
=1.25×80+1.25×8
=100+10
=110
(15)32×0.125×0.25
=4×8×0.125×0.25
=(4×0.25)×(8×0.125)
=1×1
=1
(16)6.4×0.21-0.86
=1.344-0.86
=0.484
(17)6.8×0.75÷0.5
=6.8×(0.75÷0.5 )
=6.8×1.5
=10.2
(18)2.05÷0.82+33.6
=2.05÷0.82+33.6
=2.5+33.6
=36.1
(19)1.53+23.4÷7.2
=1.53+3.25
=4.78
=(0.25×0.4)×1.7
=0.1×1.7
=0.17
(2)4.5×10.2
=4.5×(10+0.2)
=4.5×10+4.5×0.2
=45+0.9
=45.9
(3)1.28×7.5+2.5×1.28
=1.28×(7.5+2.5)
=1.28×10
=12.8
(4)2.5×64×12.5
=(2.5×4)×2×(8×12.5)
=10×2×100
=2000
(5)20.06×8.5+200.6×0.15
=20.06×(8.5+1.5)
=20.06×10
=200.6
(6)2.5×0.32+0.32×7.5
=0.32×(7.5+2.5)
=0.32×10
=3.2
(7)8.8+3.2÷2.5
=8.8+1.28
=10.08
(8)1.25×2.5×4×0.8
=(1.25×0.8)×(2.5×4)
=1×10
=10
(9)8.4×0.3÷0.12
=(8.4÷0.12)×0.3
=40×0.3
=12
(10)25×(0.4+0.8)
=25×0.4+0.8×25
=10+20
=30
(11)3.5×99+3.5
=3.5×(99+1)
=3.5×100
=350
(12)101×27-27
=(101-1)×27
=100×27
=2700
(13)1.25×0.8+1.2×1.25
=1.25×(0.8+1.2)
=1.25×2
=2.5
(14)1.25×88
=1.25×(80+8)
=1.25×80+1.25×8
=100+10
=110
(15)32×0.125×0.25
=4×8×0.125×0.25
=(4×0.25)×(8×0.125)
=1×1
=1
(16)6.4×0.21-0.86
=1.344-0.86
=0.484
(17)6.8×0.75÷0.5
=6.8×(0.75÷0.5 )
=6.8×1.5
=10.2
(18)2.05÷0.82+33.6
=2.05÷0.82+33.6
=2.5+33.6
=36.1
(19)1.53+23.4÷7.2
=1.53+3.25
=4.78
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