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计算下列各题,能简算的要简算.38+175+62=276-178+22=25×33×4=35×18=720÷45=278+304=
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计算下列各题,能简算的要简算.
38+175+62= | 276-178+22= | 25×33×4= |
35×18= | 720÷45= | 278+304= |
▼优质解答
答案和解析
(1)38+175+62,
=(38+62)+175,
=100+175,
=275;
(2)276-178+22,
=276+22-178,
=298-178,
=120;
(3)25×33×4,
=25×4×33,
=100×33,
=3300;
(4)35×18,
=35×2×9,
=70×9,
=630;
(5)720÷45,
=(720÷9)÷(45÷9),
=80÷5,
=16;
(6)278+304,
=278+300+4,
=578+4,
=582.
=(38+62)+175,
=100+175,
=275;
(2)276-178+22,
=276+22-178,
=298-178,
=120;
(3)25×33×4,
=25×4×33,
=100×33,
=3300;
(4)35×18,
=35×2×9,
=70×9,
=630;
(5)720÷45,
=(720÷9)÷(45÷9),
=80÷5,
=16;
(6)278+304,
=278+300+4,
=578+4,
=582.
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