Question

7.9×121-79×2.1脱式过程怎么写？

Answer 1

7.9×121一79×2.1
＝7.9×（121一21）
＝7.9×100
＝790

Answer 2

7.9x121一79x2.1
=7.9x121一7.9x21
=7.9x(121一21)
=7.9ⅹ100
=790。