Question

6.6*7.8+3.3*4.4如何简便计算

Answer 1

6.6×7.8+3.3×4.4=6.6×7.8+3.3×2×2.2=6.6×7.8+6.6×2.2=6.6×（7.8+2.2）=6.6×10=66

Answer 2

6.6*7.8+3.3*4.4=6.6*7.8+3.3*2*2.2=6.6*7.8+6.6*2.2=6.6*（7.8+2.2）=6.6*10=66

Answer 3

=3.3*2*7.8+3.3*4.4=3.3（15.6+4.4）=66

Answer 4

=2*3.3*7.8+3.3*4.4=3.3*(2*7.8+4.4)=66

Answer 5

=3.3(2*7.8+4.4)=3.3*20=66