口算。4÷2= 10÷5= 8÷2= 12÷4=3÷3= 4÷4=9÷3=12÷6=4÷2=5÷1= 8÷4=l÷l=
观察下列各式:12+1=2=1×222+2=6=2×332+3=12=3×442+4=20=4×5试猜想..[97%]
观察下列各式: 12+1=2=1×2 22+2=6=2×3 32+3=12=3×4 42+4=20=4×5 试猜想992+99= ( )。
3,4,5,6,9,8,12A.2,3,6,5,4,1,8,9B.8,3,5,6,2,1,4,9C.9,...[97%]
3,4,5,6,9,8,12A.2,3,6,5,4,1,8,9B.8,3,5,6,2,1,4,9C.9,2,5,6,3,4,8,1D.4,1,2,6,8,5,9,3
3,4,5,6,9,8,12A.2,3,6,5,4,1,8,9B.8,3,5,6,2,1,4,9C.9,...[97%]
3,4,5,6,9,8,12A.2,3,6,5,4,1,8,9B.8,3,5,6,2,1,4,9C.9,2,5,6,3,4,8,1D.4,1,2,6,8,5,9,3
3,4,5,6,9,8,12A.2,3,6,5,4,1,8,9B.8,3,5,6,2,1,4,9C.9,...[97%]
3,4,5,6,9,8,12A.2,3,6,5,4,1,8,9B.8,3,5,6,2,1,4,9C.9,2,5,6,3,4,8,1D.4,1,2,6,8,5,9,3
3,4,5,6,9,8,12A.2,3,6,5,4,1,8,9B.8,3,5,6,2,1,4,9C.9,...[97%]
3,4,5,6,9,8,12A.2,3,6,5,4,1,8,9B.8,3,5,6,2,1,4,9C.9,2,5,6,3,4,8,1D.4,1,2,6,8,5,9,3
3,4,5,6,9,8,12A.2,3,6,5,4,1,8,9B.8,3,5,6,2,1,4,9C.9,...[97%]
3,4,5,6,9,8,12A.2,3,6,5,4,1,8,9B.8,3,5,6,2,1,4,9C.9,2,5,6,3,4,8,1D.4,1,2,6,8,5,9,3
3,4,5,6,9,8,12A.2,3,6,5,4,1,8,9B.8,3,5,6,2,1,4,9C.9,...[97%]
3,4,5,6,9,8,12A.2,3,6,5,4,1,8,9B.8,3,5,6,2,1,4,9C.9,2,5,6,3,4,8,1D.4,1,2,6,8,5,9,3
3,4,5,6,9,8,12A.2,3,6,5,4,1,8,9B.8,3,5,6,2,1,4,9C.9,...[97%]
3,4,5,6,9,8,12A.2,3,6,5,4,1,8,9B.8,3,5,6,2,1,4,9C.9,2,5,6,3,4,8,1D.4,1,2,6,8,5,9,3
3,4,5,6,9,8,12A.2,3,6,5,4,1,8,9B.8,3,5,6,2,1,4,9C.9,...[97%]
3,4,5,6,9,8,12A.2,3,6,5,4,1,8,9B.8,3,5,6,2,1,4,9C.9,2,5,6,3,4,8,1D.4,1,2,6,8,5,9,3