脱式计算:
24×5+(36-5)
=24×5+31
=120+31
=151
简便运算:
2×75+2×25
=2×(75+25)
=2×100
=200
小数简便运算:
1.55×4+0.45×4
=4×(1.55+0.45)
=4×2
=8
我回答正确吗
脱式计算:
24×5+(36-5)
=24×5+31
=120+31
=151
简便运算:
2×75+2×25
=2×(75+25)
=2×100
=200
小数简便运算:
1.55×4+0.45×4
=4×(1.55+0.45)
=4×2
=8
我回答正确吗
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