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简介:
(1)27.15﹣13.7﹣6.3
=27.15﹣(13.7+6.3)
=27.15﹣20
=7.15
(2)3.7×+6.3÷
=×(3.7+6.3)
=×10
=
(3)2.5×32×1.25
=(2.5×4)×(8×1.25)
=10×10
=100
(4)﹣﹣
=﹣(+)
=﹣1
=
(5)125×8÷125×8
=125÷125×8×8
=125÷125×(8×8)
=1×64=64
(6)(1.6+1.6+1.6+1.6)×25
=(1.6×4)×25
=1.6×(4×25)
=1.6×100=160