直接写得数.345+233= 45×11= 527-398= 235-47-53= 0.78+1.32= 316×49= 2.56+1.4= 1.9×4×0.
直接写得数.345+233=45×11=527-398=235-47-53=0.78+1.32=316×49=2.56+1.4=1.9×4×0.5=3.67÷100=3....
直接写得数.345+233= 45×11= 527-398= 235-47-53= 0.78+1.32= 316×49= 2.56+1.4= 1.9×4×0.5= 3.67÷100= 3.25×1000= 0.125×0.8= 3.6+2.8+6.4= 6.08×304≈ 4838÷61≈ 15-2.55= 13÷2÷13= 23_14= 13+15= 12÷25= 54×6+6×14=
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解:345+233=578, | 45×11=495, | 527-398=129, | 235-47-53=135, |
0.78+1.32=2.1, | ×=, | 2.56+1.4=3.96, | 1.9×4×0.5=3.8, |
3.67÷100=0.0367, | 3.25×1000=325, | 0.125×0.8=0.1, | 3.6+2.8+6.4=12.8, |
6.08×304≈1800, | 4838÷61≈80, | 15-2.55=12.45, | ÷2÷=, |
_=, | +=, | ÷=, | ×6+6×=9. |
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