30+900= 600-200= 500+300=

80+60= 150+60= 740-40=

390+ 10+60= 70+300+200= 500+80+9=

2. Column vertical calculation

286+444+ 198= 292+ 140+258= 130+90+389=

Estimate the number of people at first, and then calculate.

108+335 229+398 2 14+496

695+ 104 20 1+486 109+605

Fill in the blanks (3 1)

1. Fill in the appropriate number in the brackets (1 ×7=7).

There are five numbers: 6 12, 98,294, 102, 30 1.

Among them, () is greater than 300, and () is less than 300.

Put these figures in order from small to large.

( )