观察下面备题的计算过程和结果,判断是否正确,对的画“√”错的画“×”,并改正过来.(1)8×35+8×25+8=8=8×(35+25+8)=72(2)14.3-(35+2.4÷223)=14.3-(35+9)=14.3-9.6=4.7(3)(-数学
题文
观察下面备题的计算过程和结果,判断是否正确,对的画“√”错的画“×”,并改正过来. (1)8×
=8=8×(
=72 (2)14.3-(
=14.3-(
=14.3-9.6 =4.7 (3)(
=(
=(
=
=39
(4)12.75-[6
=12.75-[6
=12.75-0 =12.75. |
答案