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计算下列各题,怎样简便就怎样计算(1)128+349+172(2)48×125(3)6000÷25÷4(4)(2010-906)×(65+15)(5)58×97+58+2×58(6)47×1
题目详情
计算下列各题,怎样简便就怎样计算 (1)128+349+172 | (2)48×125 |
(3)6000÷25÷4 | (4)(2010-906)×(65+15) |
(5)58×97+58+2×58 | (6)47×102 |
(7)5940÷45×(98-16) | (8)68×15-15×38. |
▼优质解答
答案和解析
(1)128+349+172
=128+172+349
=300+349
=649;
(2)48×125
=(6×8)×125
=6×(8×125)
=6×1000
=6000;
(3)6000÷25÷4
=6000÷(25×4)
=6000÷100
=60;
(4)(2010-906)×(65+15)
=1104×80
=88320;
(5)58×97+58+2×58
=58×(97+1+2)
=58×100
=5800;
(6)47×102
=47×(100+2)
=47×100+47×2
=4700+94
=4794;
(7)5940÷45×(98-16)
=5940÷45×82
=132×82
=10824;
(8)68×15-15×38
=(68-38)×15
=30×15
=450.
=128+172+349
=300+349
=649;
(2)48×125
=(6×8)×125
=6×(8×125)
=6×1000
=6000;
(3)6000÷25÷4
=6000÷(25×4)
=6000÷100
=60;
(4)(2010-906)×(65+15)
=1104×80
=88320;
(5)58×97+58+2×58
=58×(97+1+2)
=58×100
=5800;
(6)47×102
=47×(100+2)
=47×100+47×2
=4700+94
=4794;
(7)5940÷45×(98-16)
=5940÷45×82
=132×82
=10824;
(8)68×15-15×38
=(68-38)×15
=30×15
=450.
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