【单选题】Increasingly, over the past ten years, people especially young people have become aware of the need to change their eating habit, because much of the food they eat, particularly processed foods, is no...
A.
people' s growing interest in natural foods
B.
natural food and health diet
C.
the importance of fibre in foods
D.
harmful effects of sugar
【单选题】17+8.9+4.83=5.17+4.83+8.9,是用了( )。 【 A、加法结合律 B、加法交换律和结合律 C、加法交换律】
【简答题】估算. 4.83×0.52≈ 5.03×3.98≈ 4.01×8.9≈ 15.2÷2.9≈ 4.83÷0.21≈ 55.8÷3.9≈
【简答题】直接写出得数 5.17+1.96+4.83= 12.5×0.34×8= 5.01×101-5.01= ﹙ 7 12 - 1 3 )× 2 7 = 5×( 1 5 - 1 6 )×6=
【简答题】3×0.59-2.5×4.9×4+5.17×5.9.48.3×0.59-2.5×4.9×4+5.17×5.9.