1 算一算。
$\frac{1}{8}+\frac{1}{8}=$
$\frac{1}{4}+\frac{2}{4}=$
$\frac{1}{5}+\frac{1}{5}=$
$\frac{1}{6}+\frac{3}{6}=$
$\frac{1}{4}+\frac{3}{4}=$
$1-\frac{1}{2}=$
$\frac{6}{9}+\frac{2}{9}=$
$\frac{5}{12}-\frac{1}{12}=$
$\frac{7}{10}-\frac{5}{10}=$
$\frac{2}{3}-\frac{1}{3}=$
$\frac{1}{14}+\frac{12}{14}=$
$\frac{5}{20}+\frac{8}{20}=$
$\frac{8}{9}-\frac{3}{9}=$
$\frac{2}{8}+\frac{5}{8}=$
$\frac{6}{13}+\frac{5}{13}=$
$\frac{1}{8}+\frac{1}{8}=$
$\frac{1}{4}+\frac{2}{4}=$
$\frac{1}{5}+\frac{1}{5}=$
$\frac{1}{6}+\frac{3}{6}=$
$\frac{1}{4}+\frac{3}{4}=$
$1-\frac{1}{2}=$
$\frac{6}{9}+\frac{2}{9}=$
$\frac{5}{12}-\frac{1}{12}=$
$\frac{7}{10}-\frac{5}{10}=$
$\frac{2}{3}-\frac{1}{3}=$
$\frac{1}{14}+\frac{12}{14}=$
$\frac{5}{20}+\frac{8}{20}=$
$\frac{8}{9}-\frac{3}{9}=$
$\frac{2}{8}+\frac{5}{8}=$
$\frac{6}{13}+\frac{5}{13}=$
答案:
$\frac{1}{4}$
$\frac{3}{4}$
$\frac{2}{5}$
$\frac{2}{3}$
$1$
$\frac{1}{2}$
$\frac{8}{9}$
$\frac{1}{3}$
$\frac{1}{5}$
$\frac{1}{3}$
$\frac{13}{14}$
$\frac{13}{20}$
$\frac{5}{9}$
$\frac{7}{8}$
$\frac{11}{13}$
$\frac{3}{4}$
$\frac{2}{5}$
$\frac{2}{3}$
$1$
$\frac{1}{2}$
$\frac{8}{9}$
$\frac{1}{3}$
$\frac{1}{5}$
$\frac{1}{3}$
$\frac{13}{14}$
$\frac{13}{20}$
$\frac{5}{9}$
$\frac{7}{8}$
$\frac{11}{13}$
2 脱式计算。
14.2÷4+4.35
4.38×2.75÷0.3
14.1÷3+12.78÷6
3.75÷0.75+3.84-1.58
30.24÷7+3.9×2.4
28.8÷3.2×(14.9+5.6)
14.2÷4+4.35
4.38×2.75÷0.3
14.1÷3+12.78÷6
3.75÷0.75+3.84-1.58
30.24÷7+3.9×2.4
28.8÷3.2×(14.9+5.6)
答案:
14.2÷4+4.35
=3.55+4.35
=7.9
4.38×2.75÷0.3
=12.045÷0.3
=40.15
14.1÷3+12.78÷6
=4.7+2.13
=6.83
3.75÷0.75+3.84-1.58
=5+3.84-1.58
=7.26
30.24÷7+3.9×2.4
=4.32+9.36
=13.68
28.8÷3.2×(14.9+5.6)
=9×20.5
=184.5
=3.55+4.35
=7.9
4.38×2.75÷0.3
=12.045÷0.3
=40.15
14.1÷3+12.78÷6
=4.7+2.13
=6.83
3.75÷0.75+3.84-1.58
=5+3.84-1.58
=7.26
30.24÷7+3.9×2.4
=4.32+9.36
=13.68
28.8÷3.2×(14.9+5.6)
=9×20.5
=184.5
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