4-2.3+6—2.7用运算定律计算

Question

递等式计算，能简算的要简算： （14.4-14.4÷120）÷0.2 0.25×（40+4） 6.8×3.7+3.7×3.2 307×10.1 9.2÷0.4-9.2×0.4 8.3×2.7-2.7+2.7×2.7

Answer 1

（1）（14.4-14.4÷120）÷0.2
=（14.4-0.12）÷0.2
=14.28÷0.2
=71.4
（2）0.25×（40+4）
=0.25×40+0.25×4
=10+1
=11
（3）6.8×3.7+3.7×3.2
=（6.8+3.2）×3.7
=10×3.7
=37
（4）307×10.1
=307×（10+0.1）
=307×10+307×0.1
=3070+30.7
=3100.7
（5）9.2÷0.4-9.2×0.4
=23-3.68
=19.32
（6）8.3×2.7-2.7+2.7×2.7
=（8.3-1+2.7）×2.7
=10×2.7
=27