用简便方法计算 6.26+2.1+1.74 15-8.4-5.6 6.43+1.87+1.57+2
用简便方法计算6.26+2.1+1.7415-8.4-5.66.43+1.87+1.57+2.1312.27+0.4-5.2323.94-3.87+6.06-6.13...
用简便方法计算
6.26+2.1+1.74
15-8.4-5.6
6.43+1.87+1.57+2.13
12.27+0.4-5.23
23.94-3.87+6.06-6.13 展开
6.26+2.1+1.74
15-8.4-5.6
6.43+1.87+1.57+2.13
12.27+0.4-5.23
23.94-3.87+6.06-6.13 展开
3个回答
展开全部
6.26+2.1+1.74
=6.26+1.74+2.1
=8+2.1
=10.1
15-8.4-5.6
=15-(8.4+5.6)
=15-14
=1
6.43+1.87+1.57+2.13
=(6.43+1.57)+(1.87+2.13)
=8+4
=12
12.27+0.4-5.23
=12.67-5.23
=7.44 (这道题可以直接算,你看看原题是不是这样,有没有抄错)
23.94-3.87+6.06-6.13
=(23.94+6.06)-(3.87+6.13)
=30-10
=20
=6.26+1.74+2.1
=8+2.1
=10.1
15-8.4-5.6
=15-(8.4+5.6)
=15-14
=1
6.43+1.87+1.57+2.13
=(6.43+1.57)+(1.87+2.13)
=8+4
=12
12.27+0.4-5.23
=12.67-5.23
=7.44 (这道题可以直接算,你看看原题是不是这样,有没有抄错)
23.94-3.87+6.06-6.13
=(23.94+6.06)-(3.87+6.13)
=30-10
=20
追问
没抄错
2015-06-13
展开全部
6.26+1.74+2.1
15-(8.4+5.6)
(6.43+1.57)+(1.87+2.13)
12.27-5.23+0.4
23.94+6.06-(3.87+6.13)
15-(8.4+5.6)
(6.43+1.57)+(1.87+2.13)
12.27-5.23+0.4
23.94+6.06-(3.87+6.13)
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展开全部
(6.26+1.74)+2.1=8+2.1=10.1
追答
用简便方法计算
6.26+2.1+1.74
15-8.4-5.6=15-(8.4+5.6)=
15-14=1
6.43+1.87+1.57+2.13=
(6.43+1.57)+(1.87+2.13)=8+4=12
12.27+0.4-5.23=(12.27-5.23)+0.4=
23.94-3.87+6.06-6.13
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