正确、合理、灵活的计算下面各题.①(1.75×0.2+1.75×0.8)÷17.5 ②10 1 4 -(6 ...
正确、合理、灵活的计算下面各题.①(1.75×0.2+1.75×0.8)÷17.5②1014-(614-215)③243×814+75.7×82.5④38×114+125...
正确、合理、灵活的计算下面各题.①(1.75×0.2+1.75×0.8)÷17.5 ②10 1 4 -(6 1 4 -2 1 5 )③243×8 1 4 +75.7×82.5 ④ 3 8 ×1 1 4 +125%+0.625×1.25⑤0.91÷ 4 5 +1.25×10.9 ⑥( 5 6 + 7 8 - 5 12 )÷ 1 24 .
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(1)(1.75×0.2+1.75×0.8)÷17.5, =1.75×(0.2+0.8)÷17.5, =1.75×1÷17.5, =1.75÷17.5, =0.1; (2)10
=10
=4+2
=6
(3)243×8
=(24.3+75.7)×82.5, =100×82.5, =8250; (4)
=1.25×(
=1.25×2, =2.5; (5)0.91÷
=1.25×(0.91+10.9), =1.25×11.81, =14.7625; (6)(
=
=20+21-10, =31. |
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