题目内容
脱式计算,能简便运算的要简便运算
| 774÷(27+16) | 39+144+61 | 27×4×5 | 857-318-182. |
(1)774÷(27+16),
=774÷43,
=18;
(2)39+144+61,
=39+61+144,
=100+144,
=244;
(3)27×4×5,
=27×(4×5),
=27×20,
=540;
(4)857-318-182,
=857-(318+182),
=857-500,
=357.
=774÷43,
=18;
(2)39+144+61,
=39+61+144,
=100+144,
=244;
(3)27×4×5,
=27×(4×5),
=27×20,
=540;
(4)857-318-182,
=857-(318+182),
=857-500,
=357.
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