题目内容
| 算式里有括号的,要先算括号里面的. (16+72)÷4 |
(36+45)×5 | (42-18)×6 |
| (100-36)÷16 | 16×(32÷4) | 128÷(8×4) |
| 19×(41-27) | 96÷(18+14) | 128-(160-116) |
| 36÷(96÷16) | 412-(136+116) | 112÷(7×8) |
分析:按照先算括号里面的运算,再算括号外面的运算计算即可.
解答:解:(1)(16+72)÷4
=88÷4
=22;
(2)(36+45)×5
=81×5
=405;
(3)(42-18)×6
=24×6
=144;
(4)(100-36)÷16
=64÷16
=4;
(5)16×(32÷4)
=16×8
=128;
(6)128÷(8×4)
=128÷32
=4;
(7)19×(41-27)
=19×14
=266;
(8)96÷(18+14)
=96÷32
=3;
(9)128-(160-116)
=128-44
=84;
(10)36÷(96÷16)
=36÷6
=6;
(11)412-(136+116)
=412-252
=160;
(12)112÷(7×8)
=112÷56
=2.
=88÷4
=22;
(2)(36+45)×5
=81×5
=405;
(3)(42-18)×6
=24×6
=144;
(4)(100-36)÷16
=64÷16
=4;
(5)16×(32÷4)
=16×8
=128;
(6)128÷(8×4)
=128÷32
=4;
(7)19×(41-27)
=19×14
=266;
(8)96÷(18+14)
=96÷32
=3;
(9)128-(160-116)
=128-44
=84;
(10)36÷(96÷16)
=36÷6
=6;
(11)412-(136+116)
=412-252
=160;
(12)112÷(7×8)
=112÷56
=2.
点评:整数混合运算的关键是抓住运算顺序,正确按运算顺序计算即可.
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