题目

简便运算．（ ﹣ ）×15 4×0.8×2.5×12.557×99+579.6﹣1.46﹣0.54 897÷25÷4 5.8×4.7+4.2×4.7． 答案：解：①（ 23 ﹣ 15 ）×15= 23 ×15﹣ 15 ×15=10﹣3=7；②4×0.8×2.5×12.5=（4×2.5）×（0.8×12.5）=10×10=100；③57×99+57=57×（99+1）=57×100=5700；④9.6﹣1.46﹣0.54=9.6﹣（1.46+0.54）=9.6﹣2=7.6；⑤897÷25÷4=897÷（25×4）=897÷100=8.97；⑥5.8×4.7+4.2×4.7=（5.8+4.2）×4.7=10×4.7=47．Healthy eating begins with learning how to “eat smart”. It’s not just what you eat，.　　　　 how you eat. Pay attention to what you eat and choosing foods that are both nourishing　　　　 enjoyable  helps support an overall healthy diet. Take time to chew your food： Chew your food slowly， savoring every bite. We tend to rush through our meals， forgetting to actually taste the flavors and feel the textures(质地) of 　　　 is in our mouths. Reconnect with　　  joy of eating. Avoid stress while eating：  Avoid eating while working， driving， arguing， or watching TV. Try taking some deep breaths  before beginning your meal， or light candles and play soothing music to create a relaxing atmosphere. Listen to your body： Ask 　　　　 if you are really hungry. You may really be thirsty， so try drinking a glass of water first. During a meal， stop eating before you feel full. It actually takes a few minutes 　　　　 your brain to tell your body that it has had 　　　　 food， so eat slowly. Eat early： Starting your day　　　　 a healthy breakfast can jumpstart your metabolism(新陈代谢)， and eating early in the day gives your body time to work those calories off.