口算.46+34= 72-28= 800×5= 5000+200= 32×2= 96÷3= 80÷4= 7700-700= 64÷2= 27+45= 8
口算.46+34=72-28=800×5=5000+200=32×2=96÷3=80÷4=7700-700=64÷2=27+45=85-78=1400-600=25+15...
口算.46+34= 72-28= 800×5= 5000+200= 32×2= 96÷3= 80÷4= 7700-700= 64÷2= 27+45= 85-78= 1400-600= 2 5 + 1 5 = 4 7 - 1 7 = 3 8 + 4 8 = 9 10 - 6 10 =
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