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幼苗
共回答了23个问题采纳率:100% 举报
187-(87+15)
=187-87-15
=100-15
=85
1048-531-469
=1048-(531+469)
=1048-1000
48
965+200-4
=1165-4
=1161
78+247+122
=78+22+247
=200+247
=447
487-87+258
=400+258
=658
242-125+358-275
=242+358-(125+275)
=600-400
200
800-127-75-273
=800-(127+273)-75
=800-400-75
=400-75
= 325
14.5+7.65×4+25.5+2.35×4+40
= 7.65×4+2.35×4+40+14.5+25.5
=(7.65+2.35)×4+40+(14.5+25.5)
=40+40+40
120
400-82.63-17.37
=400-(82.63+17.37)
=400-100
=300
7.29+23.64+13.71
=7.29+13.71 +23.64
=21+23.64
44.64
2100÷42
=2100÷21÷2
=100÷2
=50
630÷14
=630÷7÷2
=90÷2
=45
1年前
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