(-42.75)*(-27.36)-(-72.64)*(+42.75)=?
(-42.75)*(-27.36)-(-72.64)*(+42.75)=?
(-42.75)*(-27.36)-(-72.64)*(+42.75)=?后面有个)(+42.75)为什么前面得负请说明
小数的含义42.75表示( ).它是有( )个十,( )个一,( )个0.1,( )个0.01组成的?
1.2(x-3)=10.8,(x加1.42)÷0.6等于4,(2x-6)乘3等于72.64除以(x加3)等于16,(7.
( )( )( )28/( )( )=( )( )( )
( )+( )=( )+( )=( )+( )=( )+( )
plan =( ) ( ) ( )
( )/( )=0.618
123456789()除以()=()除以()=()()()除以()()
012345679 ()*()=()() ()()-()()=()
0-9的循环式=()-()=()-()=()-()=()+()=()-()
100=()+()=()+()(填质数)