能简算的要简算:9.2×1.3+21.14 } 75.6-3.2×11 }
1个回答
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9.2×1.3+21.14
=(10-0.8)×1.3+21.14
=10×1.3-0.8×1.3+21.14
=13-1.04+21.14
=13+(21.14-1.04)
=13+20.1
=33.1
75.6-3.2×11
=75.6-3.2×(10+1)
=75.6-32-3.2
=43.6-3.2
=40.4
5.06×3.24+5.06×6.76
=5.06×(3.24+6.76)
=5.06×10
=50.6
19.6÷3.2×8
=8×8
=64
=(10-0.8)×1.3+21.14
=10×1.3-0.8×1.3+21.14
=13-1.04+21.14
=13+(21.14-1.04)
=13+20.1
=33.1
75.6-3.2×11
=75.6-3.2×(10+1)
=75.6-32-3.2
=43.6-3.2
=40.4
5.06×3.24+5.06×6.76
=5.06×(3.24+6.76)
=5.06×10
=50.6
19.6÷3.2×8
=8×8
=64
追问
19.6÷3.2×8
=8×8
=64
你这个做得不对吧?
追答
哦 是的
19.6÷3.2×8
=19.6÷(3.2÷8)
=19.6÷0.4
=49
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