Solve the following arithmetic problems by filling in the boxes.

Решение:

• \( 40 + 712 = 752 \)
• \( 938 - 921 = 17 \)
• \( 149 + 241 = 390 \)
• \( 493 - 317 = 176 \)
• \( 832 + 109 = 941 \)
• \( 628 - 30 = 598 \)
• \( 479 + 430 = 909 \)
• \( 816 - 100 = 716 \)
• \( 21 + 291 = 312 \)
• \( 999 - 211 = 788 \)
• \( 900 + 88 = 988 \)
• \( 628 - 121 = 507 \)
• \( 328 + 633 = 961 \)
• \( 976 - 804 = 172 \)
• \( 16 + 802 = 818 \)
• \( 809 - 653 = 160 \)
• \( 378 + 510 = 888 \)
• \( 833 - 212 = 621 \)
• \( 257 + 35 = 292 \)
• \( 919 - 390 = 529 \)
• \( 503 + 10 = 513 \)
• \( 307 - 225 = 82 \)
• \( 107 + 111 = 218 \)
• \( 483 - 415 = 68 \)
• \( 231 + 152 = 383 \)
• \( 331 - 182 = 149 \)
• \( 333 + 367 = 700 \)
• \( 654 - 648 = 6 \)
• \( 231 + 200 = 431 \)
• \( 242 - 223 = 19 \)
• \( 426 + 326 = 752 \)
• \( 899 - 545 = 354 \)

Ответ: 40, 938, 149, 317, 109, 30, 479, 816, 21, 211, 88, 628, 328, 804, 802, 809, 378, 212, 35, 919, 503, 225, 111, 483, 231, 182, 367, 654, 231, 223, 426, 545.