153÷45+6.6
(
)×24=3.6×[2÷(
)].解:(1)153÷45+6.6=3.4+6.6,、
=10;
(2)(
)×24=
×24+
×24+
×24,=6+3+2,
=11;
(3)3.6×[2÷(
)].=3.6×[2÷(0.8-0.6)],
=3.6×[2÷0.2],
=3.6×10,
=36.
分析:(1)(3)根据四则混合运算的运算顺序计算即可,先算乘除,再算加减,有括号的要先算括号里面的;
(2)可根据乘法分配律计算.
点评:当算式中同时含有中括号与小括号时,要注意先算小括号里面的,再算中括号里面的.