计算下面各题,能简便计算的用简便方法计算.4.82-5.2÷0.8×0.6 [ 1 2 -( 3 4
计算下面各题,能简便计算的用简便方法计算.4.82-5.2÷0.8×0.6[12-(34-35)]÷71079×511+29×51112.3×9957.5-14.25-1...
计算下面各题,能简便计算的用简便方法计算.4.82-5.2÷0.8×0.6 [ 1 2 -( 3 4 - 3 5 )]÷ 7 10 7 9 × 5 11 + 2 9 × 5 11 12.3×99 57.5-14.25-15 3 4 3.2×12.5×0.25.
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(1)4.82-5.2÷0.8×0.6, =4.82-6.5×0.6, =4.82-3.9, =0.92; (2)[
=[
=
=
(3)
=(
=1×
=
(4)12.3×99, =12.3×(100-1), =12.3×100-12.3×1, =1230-12.3, =1217.7; (5)57.5-14.25-15
=57.5-(14.25+15
=57.5-30, =27.5; (6)3.2×12.5×0.25, =8×0.4×12.5×0.25, =(8×12.5)×(0.4×0.25), =100×0.1, =10. |
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