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49×101简便计算

简便计算 49×101 =49×(100+1) =49×100+49 =4900+49 =4949

简便计算 49×101 =49×(100+1) =49×100+49 =4900+49 =4949

45×101 =45×(100+1) =45×100+45×1 =4500+45 =4545

=48×(101-1) =48×100 =4800

解:原式=569×(100+1) =569×100+569×1 =56900+569 =57469

48+(100+1)=48×100+48×1=4848

75×101 =75×(100+1) =75×100+75 =7500+75 =7575

(1)8.08×1.25=(8+0.08)×1.25=8×1.25+0.08×1.25=10+0.1=10.1(2)49.5×101-49.5=49.5×(101-1)=49.5×100=4950(3)4.6+5.6×0.83=4.6+4.648=9.248(4)12.8+2.04×9.5=12.8+19.38=32.18(5)22-1.6×7 =22-11.2=10.8(6)2.5×0.6-1.8×0.5=1.5-0...

(1)45×102,=45×(100+2),=45×100+45×2,=4500+90,=4590; (2)4.93×101-4.93,=4.93×(101-1),=4.93×100,=493;(3)63×( 49+57+821),=63×49+63×57+63×821,=28+45+24,=73+24,=97;(4)400÷1.25÷8,=400÷(1.25×8),=400÷10,=...

49.1×8.56+49.1×1.44 =49.1x(8.56+1.44) =49.1x10 =491 1.25×88 =1.25x8x11 =10x11 =110 8.07×101 =8.07x100+8.07x1 =807+8.07 =815.07

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