
用自己喜欢的方法计算0.625×0.5+ 5 8 + 1 2 ×62.5%2.5×( 9 10 +
用自己喜欢的方法计算0.625×0.5+58+12×62.5%2.5×(910+910+910+910)(111+999)÷[56×(37-38)]49.5×1035-(...
用自己喜欢的方法计算0.625×0.5+ 5 8 + 1 2 ×62.5%2.5×( 9 10 + 9 10 + 9 10 + 9 10 )(111+999)÷[56×( 3 7 - 3 8 )]49.5× 10 3 5 -(50- 1 2 )×0.6.
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(1)0.625×0.5+
=0.625×0.5+0.625+0.5×0.625, =(0.5+1+0.5)×0.625, =2×0.625, =1.25; (2)2.5×(
=2.5×(4×
=2.5×4×
=10×
=9; (3)(111+999)÷[56×(
=1110÷[56×
=1110÷[24-21], =1110÷3, =370; (4)49.5× 10
=49.5×(10+0.6)-49.5×0.6, =49.5×10+49.6×0.6-49.5×0.6, =495+(0.6-0.6)×49.5, =495+0×49.5, =495+0, =495. |
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