计算下面各题能简算的要简算234×25×8
计算下面各题(能简算的要简算)25×8×4×125201×4138×99+38425+21×(12+28)15×[120-(42+36)]....
计算下面各题(能简算的要简算)
25×8×4×125
201×41
38×99+38
425+21×(12+28)
15×[120-(42+36)]. 展开
25×8×4×125
201×41
38×99+38
425+21×(12+28)
15×[120-(42+36)]. 展开
1个回答
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(1)25×8×4×125
=25×4×(8×125)
=100×1000
=100000;
(2)201×41
=(200+1)×41
=200×41+1×41
=8200+41
=8241;
(3)38×99+38
=38×(99+1)
=38×100
=3800;
(4)425+21×(12+28)
=425+21×40
=425+840
=1265;
(5)15×[120-(42+36)]
=15×[120-78]
=15×42
=630.
=25×4×(8×125)
=100×1000
=100000;
(2)201×41
=(200+1)×41
=200×41+1×41
=8200+41
=8241;
(3)38×99+38
=38×(99+1)
=38×100
=3800;
(4)425+21×(12+28)
=425+21×40
=425+840
=1265;
(5)15×[120-(42+36)]
=15×[120-78]
=15×42
=630.
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