题目内容
32÷3×12=______
10+12+14+…+24+26=______.
10+12+14+…+24+26=______.
(1)32÷3×12,
=32×(12÷3),
=32×4,
=128;
(2)10+12+14+…+24+26,
=(10+26)×9÷2,
=36×9÷2,
=162.
=32×(12÷3),
=32×4,
=128;
(2)10+12+14+…+24+26,
=(10+26)×9÷2,
=36×9÷2,
=162.
练习册系列答案
相关题目
口算.
| 80×20%= | 24×0.2= | 5- | 32= | |
| 36÷12%= | 1 | 2.1+3.25= | (0.2)2×52= |