在横线上填上正确的数。 (1) 32+20→-6→+9→ (2) 90-7→-30→+8→ 答案:【1】52【2】46【3】55
【1】83【2】53【3】61 — The Internet has made communication much more .— I agree. For example, I can communicate with my friends on WeChat any time.A. popular B. necessaryC. important D. convenient