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78 34 24 37简便计算

78x37十24x37=(78+24)x37=(100+2)x37=100x37+2x37=3700+74=3774

(1-1)78*37 =0*78*37(0乘以任何数得0) =0

78*34-42*33=78x(33+1)-42x33=78x33+78-42x33=33x(78-42)+78=33x36+2x36=35x36=1260.

原式=78x2x12x38x156=156x156x156=156^3 或=3796916

(1)24*(7 8 +3 2 -3 4 )=24*7 8 +24*3 2 -24*3 4 =21+36-18=39 (2)1 5 *37%+4 5 *37%=1 5 *0.37+4 5 *0.37=(1 5 +4 5 )*0.37=1*0.37=0.37(3)2.7*5 9 *6 5 =1.5*6 5 =1.8 (4)(7 10 +5 6 )÷1 30 =(7 10 +5 6 )*30=7 10 *30+5 6 *30=21+25=46

34*75-34-34*24的简便计算 =34x(75-1-24) =34x50 =1700

(1)29+12÷45+38,=29+ 4 15 +38,=29 4 15 +38,=67 4 15 ;(2)813÷7+17*6,=116 1 7 +102,=218 1 7 ;(3)132-613÷926-23,=132- 613 926 -23,=132-23- 613 926 ,=109- 613 926 ,=108 313 926 ;(4)125*(56+34)+45,=125*90+45,=11250+45,=11295.

78*24+36*51+36=78*24+36*(51+1)=78*24+36*52=78*12*2+12*3*52=(78*2+52*3)*12=312*12=3744

37前面应该是加吧?78x37+37x22=37x(78+22)=37x100=3700 祝天天向上.

78X3.7+2.2X37=7.8X37+2.2*37=37X(7.8+2.2)=37*10=370

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