下面各题,怎样简便怎样算.983-(583+126) 136乘101-136 175乘56-56乘75 48乘125 3
来源:学生作业帮 编辑:大师作文网作业帮 分类:数学作业 时间:2024/11/11 09:50:12
下面各题,怎样简便怎样算.983-(583+126) 136乘101-136 175乘56-56乘75 48乘125 355+260+140+245
还有:1500/25/4 135乘99 37乘94+37乘5+37 425-38+75 用递等式计算.本人没分了.
还有:1500/25/4 135乘99 37乘94+37乘5+37 425-38+75 用递等式计算.本人没分了.
983-(583+126)
=983-583-126
=400-126
=274
136×101-136
=136×(101-1)
=136×100
=13600
175×56-56×75
=(100+75)×56-56×75
=100×56+75×56-56×75
=100×56
=5600
48×125
=4×12×25×5
=(4×25)×(12×5)
=100×60
=6000
355+260+140+245
=(355+245)+(260+140)
=600+400
=1000
1500÷25÷4
=1500÷(25×4)
=1500÷100
=15
135×99
=135×(100-1)
=13500-135
=13365
37×94+37×5+37
=37×(94+5+1)
=37×100
=3700
425-38+75
=425+75-38
=500-38
=462
=983-583-126
=400-126
=274
136×101-136
=136×(101-1)
=136×100
=13600
175×56-56×75
=(100+75)×56-56×75
=100×56+75×56-56×75
=100×56
=5600
48×125
=4×12×25×5
=(4×25)×(12×5)
=100×60
=6000
355+260+140+245
=(355+245)+(260+140)
=600+400
=1000
1500÷25÷4
=1500÷(25×4)
=1500÷100
=15
135×99
=135×(100-1)
=13500-135
=13365
37×94+37×5+37
=37×(94+5+1)
=37×100
=3700
425-38+75
=425+75-38
=500-38
=462