357乘42加42乘142加42脱式计算怎么做
357乘42加42乘142加42脱式计算怎么做
357×42+42×142+42
=42×(357+142+1)
=42×500
=21000
42加八乘六脱式计算
42加八乘六脱式计算
42+8×6
=42+48
=90
82.5乘42加15.5乘42加42乘2用简算怎么做
82.5X42+15.5X42+42X2
=(82.5+15.5+2)X42
=100X42
=4200
42乘以76加42乘以25减42公式如何计算
解:逆用乘法分配律即可
原式=42×76+42×25-42×1
=42×(76+25-1)
=42×100
=4200
13、5乘42加5、8乘0、135用脱式计算简写
13.5x42+5.8x0.135
=13.5x42+0.058x13.5
=13.5x(42+0.058)
=13.5x42.058
=567.783
77乘42加42简便计算
77乘42加42简便计算
77乘42加42
=42*(77+1)
=42*(80-2)
=42*80-42*2
=3360-84
=3276
58乘以42点5加24乘以42点5加18乘42点5简便计算
58x42.5+24x42.5+18x42.5
=(58+24+18)x42.5
=100x42.5
=4250
42乘99简便脱式计算
42x99
=42x(100-1)
=42x100-42
=4158
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0.98乘以42用脱式计算
=42*(1-0.02)
=42-42*0.02
=42-0.84
=41.16
48乘18加12乘42减42乘20筒便怎么做
48X18+12X42-42X20
=48X(10+8)-42X(20-12)
=48X10+48X8-42X8
=480+8X(48-42)
=480+8X6
=480+48
=528