计算:①5.24+7.9+4.76 ②25×37×4 ③5.12-1.47-2.53 ④156×101-156 ⑤450÷5÷9 ⑥52×23+48×
计算:①5.24+7.9+4.76②25×37×4③5.12-1.47-2.53④156×101-156⑤450÷5÷9⑥52×23+48×23⑦4.5+3.15-4.5...
计算:①5.24+7.9+4.76 ②25×37×4 ③5.12-1.47-2.53 ④156×101-156 ⑤450÷5÷9 ⑥52×23+48×23 ⑦4.5+3.15-4.5+3.15.
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①5.24+7.9+4.76,
=5.24+4.76+7.9,
=10+7.9,
=17.9;
②25×37×4,
=25×4×37,
=100×37,
=3700;
③5.12-1.47-2.53,
=5.12-(1.47+2.53),
=5.12-4,
=1.12;
④156×101-156,
=156×(101-1),
=156×100,
=15600;
⑤450÷5÷9,
=450÷(5×9),
=450÷45,
=10;
⑥52×23+48×23,
=(52+48)×23,
=100×23,
=2300;
⑦4.5+3.15-4.5+3.15,
=(4.5-4.5)+(3.15+3.15),
=0+6.3,
=6.3.
=5.24+4.76+7.9,
=10+7.9,
=17.9;
②25×37×4,
=25×4×37,
=100×37,
=3700;
③5.12-1.47-2.53,
=5.12-(1.47+2.53),
=5.12-4,
=1.12;
④156×101-156,
=156×(101-1),
=156×100,
=15600;
⑤450÷5÷9,
=450÷(5×9),
=450÷45,
=10;
⑥52×23+48×23,
=(52+48)×23,
=100×23,
=2300;
⑦4.5+3.15-4.5+3.15,
=(4.5-4.5)+(3.15+3.15),
=0+6.3,
=6.3.
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