问题
解答题
简便运算. 198-(98+37)
|
答案
(1)198-(98+37 )
=198-98-37,
=100-37,
=63;
(3)
×12.5×7 4
×8 5 7
=(
×7 4
)×(12.5×8),5 7
=
×100,5 4
=125;
×40-7 16
÷5 16 1 40
=
×40-7 16
×40,5 16
=(
-7 16
)×40,5 16
=
×40,1 8
=5.