能简算的要简算:9.2×1.3+21.14 } 75.6-3.2×11 }

问题描述:

能简算的要简算:9.2×1.3+21.14 } 75.6-3.2×11 }
5.06×3.24+5.06×6.76
19.6÷3.2×8

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
=6419.6÷3.2×8 =8×8 =64你这个做得不对吧?哦 是的 19.6÷3.2×8 =19.6÷(3.2÷8) =19.6÷0.4 =49