72x34一66x28怎么用简便方法计算
72x34一66x28怎么用简便方法计算
72X34-66X28
=66X34-66X28+6X34
=66X6+204
=396+204
=600
72十72X34十72X65用简便计算怎么算
72十72X34十72X65
=72X(1+34+65)
=72X100
=7200
用简便方法计算34X28十28X66
34x28+28x66
=(34+66)x28
=100x28
=2800
用简便方法计算72x23十23x28
72x23十23x28
=23*(72+28)
=23*100
=2300
34+5.2x0.42 怎么用简便方法计算
34+5.2x0.42
=34+(5+0.2)x0.42
=34+2.1+0.84
=36.94
用简便方法计算:72×34—66×28。
原式=(100-28)×34-66×28
=100×34-28×34-66×28
=3400-(28×34+66×28)
=3400-28×(34+66)
=3400-28×100
=3400-2800
=600
72X26十30X48怎么用简便方法计算
72×26+30×48
=24×3×2×13+3×10×24×2
=24×3×2×(13+10)
=144×(10+10+3)
=1440+1440+432
=2880+432
=3312
简便方法计算72x16+16x28
原式
=(72+28)x16
=100x16
=1600
供参考。
42x36十72x29简便方法计算
42x36十72x29简便方法计算
=36x(42+2x29)
=36x100
=3600
102x25怎么用简便方法计算
102x25
=(100+2)x25
=100x25+2x25
=2500+50
=2550
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