78乘以99加78的分配律
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99×22+33×34=33×66+33×34=33×(66+34)=33*100=3300
99乘以39加39=99×39+1×39=39×(99+1)=39×100=3900
600/25=6*100/25=6*4=24(16*4+16*6)*16=16*(4+6)*16=160*16=2560302*99+138=302*(100-1)+138=30200-302+138
222*88+888*78=222*4*22+888*78=888*22+888*78=888*(22+78)=888*100=88800
2001x2003x(2001/2002-2002/2003)=2001x2001x2003/2002-2001x2002=2001x(2001x2003-2002x2002)/2002=2001x(
86*6+6*14=6*(86+14)=6*100=600
103x12=(100+3)x12=100x12+3x12=1200+36=1236
是乘法分配律4/5×99+4/5=4/5×99+4/5×1=4/5×(99+1)=0.8×100=80
99*99+99*399*(99+1)+99*299*100+99*2(100-1)*100+(100-1)*2
此题肯定是小学生问的,楼上解答都省略了关键的一步:34+99×34=34×1+99×34=34×(1+99)=34×100=3400
99*68+68=(99+1)*68=100*68=680099*(68+68)=99*68*2=(100-1)*68*2=13600-136=13564
(100-1)*36+(100-1)=3700-373663
(100-1)乘以56=5600-56=5544
33*66+99*78=33*66+33*3*78=33*66+33*234=33*(66+234)=33*300=9900
105×78-5×78=(105-5)×78=100×78=7800很高兴为您解答,【学习宝典】团队为您答题.请点击下面的【选为满意回答】按钮.
485×99=485×(100-1)=48500-485=4801578×99+78=78×(99+1)=78007×55+7×46-7=7×(55+46-7)=7×(100-6)=700-42=65
100×99+2=100×(100-1)+2=100×100-100×1+2=10000-100+2=9900+2=9902
解题思路:乘法对加法的分配率解题过程:varSWOC={};SWOC.tip=false;try{SWOCX2.OpenFile("http://dayi.prcedu.com/include/rea
78*41-78*40=78*(41-40)=78*1=78