**1.**

a |
23 + 56 = 79 |
k |
234 × 10 = 2340 |

b |
34 + 65 + 73 = 172 |
l |
46 x 40 = 1840 |

c |
324 + 321 = 645 |
m |
234 x 5 = 1170 |

d |
459 + 843 = 1302 |
n |
41 x 23 = 943 |

e |
3492 + 4599 = 8091 |
o |
4 x 5 x 6 = 120 |

f |
98 − 45 = 53 |
p |
98 x 75 = 7350 |

g |
548 − 315 = 233 |
q |
3400 ÷ 100 = 34 |

h |
324 − 197 = 127 |
r |
6450 ÷ 50 = 129 |

i |
3096 − 2538 = 558 |
s |
6848 ÷ 8 = 856 |

j |
567 − 321 − 198 = 48 |
t |
4872 ÷ 2 ÷ 12 = 203 |

**2. **139 firemen**3.** 462 students play sport altogether.**4. **The people pay a total of $98, 776.**5. **There would be 7653 empty seats.**6. **42 books were missing.**7. **4780 cm of tape would be needed.**8. **47.8 metres of tape would be needed.**9. **There are 16 200 seats in the three stands.**10. **The band bought 14 trombones.