Question

43×72+29×43-43等于多少用简便运算？

Answer 1

43×72+29×43－43
=43×（72+29－1）
=43×100
=4300

Answer 2

43×72+29×43–43
=43×72+43×29–43×1
=43×(72+29–1)
=43×100
=4300

Answer 3

43×72+29×43-43
=43×(72+29-1)
=43×100
=4300

Answer 4

43×72+29×43-43
＝43×（72+29-1）
＝43×100
＝4300

Answer 5

43x72+29x43-43
=43x（72+29-1）
=43x100
=4300