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1.
× ÷
÷ +
2.
7.32 2.68
0.3 0.2
1.75 1
5.8 1
3.
0.8×0.68×125 90-3.54-11.46
=0.8×125×0.68 =90-(3.54+11.46)
=100x0.68 =90-15
=68 =75
3.6÷0.4-1.2×5 0.73×99+0.73
=9-6 =0.73×(99+1)
=3 =0.73×100
=73
(31.6-11.7)÷2.5÷0.4 3.75×99
=(31.6-11.7)÷(2.5×0.4) =3.75×100-3.75
=19.9÷1 =375-3.75
=19.9 =371.25