黄冈小状元四年级下的66乘21+19乘21+85乘19=什么,用简便方法计算
答案:7 悬赏:30 手机版
解决时间 2021-04-03 01:23
- 提问者网友:凉末
- 2021-04-02 10:12
黄冈小状元四年级下的66乘21+19乘21+85乘19=什么,用简便方法计算
最佳答案
- 五星知识达人网友:人類模型
- 2021-04-02 10:48
66×21+19×21+85×19
= 21×(66+19)+85×19 (前2项运用乘法分配率,提取公因数19)
= 21×85+85×19 (计算66+19=85)
= 85×(21+19) (运用乘法分配率,提取公因数85,计算21+19=40)
= 85×40 (计算85×40=3400)
= 3400
= 21×(66+19)+85×19 (前2项运用乘法分配率,提取公因数19)
= 21×85+85×19 (计算66+19=85)
= 85×(21+19) (运用乘法分配率,提取公因数85,计算21+19=40)
= 85×40 (计算85×40=3400)
= 3400
全部回答
- 1楼网友:夜风逐马
- 2021-04-02 16:09
66*21+19*21+85*19
=(66+19)*21+85*19
=85*21+85*19
=85*(21+19)
=85*40
=340
=(66+19)*21+85*19
=85*21+85*19
=85*(21+19)
=85*40
=340
- 2楼网友:長槍戰八方
- 2021-04-02 15:19
66*21+19*21+85*19
=(66+19)*21+85*19
=85*21+85*19
=85*(21+19)
=85*40
=3400
=(66+19)*21+85*19
=85*21+85*19
=85*(21+19)
=85*40
=3400
- 3楼网友:污到你湿
- 2021-04-02 14:36
66*21+19*21+85*19
=(66+19)*21+85*19
=85*21+85*19
=85*(21+19)
=85*40
=340
这很简单的
=(66+19)*21+85*19
=85*21+85*19
=85*(21+19)
=85*40
=340
这很简单的
- 4楼网友:举杯邀酒敬孤独
- 2021-04-02 13:40
66乘21+19乘21+85乘19
=(66+19)乘21+85乘19
=85乘21+85乘19
=85乘(21+19)
=85乘40
=3400
=(66+19)乘21+85乘19
=85乘21+85乘19
=85乘(21+19)
=85乘40
=3400
- 5楼网友:枭雄戏美人
- 2021-04-02 13:30
66*21+19*21+85*19
=(66+19)*21+85*19
=85*21+85*19
=85*(21+19)
=85*40
=340
=(66+19)*21+85*19
=85*21+85*19
=85*(21+19)
=85*40
=340
- 6楼网友:妄饮晩冬酒
- 2021-04-02 12:14
66×21+19×21+85×19
=(66+19)×21+85×19
=85×21+85×19
=85×(21+19)
=85×40
=340
=(66+19)×21+85×19
=85×21+85×19
=85×(21+19)
=85×40
=340
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