Question

9.26+8.9-(3.96+1.3)的简便计算方法？

Answer 1

9.26+8.9-（3.96+1.3）
=9.26+8.9-5.26
=9.26-5.26+8.9
=4+8.9
=12.9

Answer 2

=9.26+8.9-3.96-1.3
=9+0.26+8+0.9-3-0.96-1-0.3
=（9+8-3-1）+（0.26+0.9-0.96-0.3）
=13+（0.26-0.3）+（0.9-0.96）
=13-0.04-0.06
=13-（0.04+0.06）
=13-0.1
=12.9

Answer 3

等于12.9。
9.26+8.9-(3.96+1.3)
=9.26+8.9-(3+1+0.96+0.3)
=9.26+8.9-5.26
=9.26-5.26+8.9
=4+8.9
=12.9
答案:等于12.9。

Answer 4

9.26+8.9-（3.96+1.3）
=9.26+8.9-3.96-1.3
=(9.26-3.96)+(8.9-1.3)
=(9.26-4+0.04)+7.6
=5.3+7.6
=12.9

Answer 5

9.26+8.9-（3.96+1.3）
=9.26+8.9-（0.06+3.9+1.3）
=（9.26-0.06）+（8.9-3.9）-1.3
=9.2+5-1.2-0.1
=（9.2-1.2）+（5-0.1）
=8+4.9
=12.9