Fill in the appropriate operation symbol in ﹣ and the appropriate number in ﹣ respectively 80÷16=﹙80○□)÷(16÷4) 200÷40=(200÷20)÷(40○□) 180÷15=(180÷30)÷(15○□)
÷ 4
÷20
÷30
Fill in the appropriate operation symbol in 0
Please answer as soon as possible,
4÷4×4÷4=1
4÷4+4÷4=2
4+4-4÷4=7
4+4+4-4=8
Fill in the appropriate operation symbol in 0 and the appropriate number in brackets
1).45+X=67
45○( )+x=67○( )
2).x-4.2=10
x-4.2○( )=10○( )
45-( 45)+x=67-(45 )
x-4.2+( 4.2)=10+( 4.2)
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