Question

请问上面两道简便运算怎么写，求学霸解答，谢谢

Answer 1

追答

Answer 2

999×7778+333×666
=999×7778+999×222
=999×（7778+222）
=999×8000
=7992000

5.6×69.32+138.64×0.05+693.2×0.43
=5.6×69.32+69.32×0.1+69.32×4.3
=69.32×（5.6+0.1+4.3）
=69.32×10
=693.2

Answer 3

333•3•7778+333•666=333（3•7778+666）=333（3•7778+3•222）=333•3（7778+222）=999•10000=9990000

追答

•是乘号

下一题 5.6•69.32+69.32•2•0.05+69.32•10•0.43=69.32(5.6+0.1+4.3)=69.32•10=693.2